Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-19-2009, 03:04 PM   #1
Newbie
 
Join Date: Jan 2009
Posts: 10
Share |
Default

? about wiring a combo bathfan/light/heater


Hello,I'am planning a bathroom remodel and just trying to get a plan together.My bathroom currently doesn't have a fan just two lights,one in the center of the ceiling and one above the vanity both on their own switch.I'd like to replace the ceiling light with a bathfan/light/heater combo.The two light switches are in a double gang box,about 2ft over is an outlet.My outside outlet is on the same circut as the bath outlet which is on a 15amp gfi breaker.What I would like to do is remove the outside outlet from the circut and power the new fan from the bath outlet.I would need to run a wire from the outlet to the switch box for the fan power and also add an additional 12/3 wire for the 3 way rocker switch.Will this plan work?Also currently the switch box has four wires coming into it and I would need to add two additional wires I'm concerned about having to many wires in the box.I would really appreciate any input thanks.

snake2k is offline   Reply With Quote
Old 02-19-2009, 03:48 PM   #2
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,688
Default

? about wiring a combo bathfan/light/heater


No. Read the directions on the fan/heater. It may require a seperate circuit

__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 02-19-2009, 05:07 PM   #3
Newbie
 
Join Date: Jan 2009
Posts: 10
Default

? about wiring a combo bathfan/light/heater


I don't have the fan yet but I looked up the instructions online.It says a seperate 15amp circuit is recommended.Would it really be a problem if the bath outlet and fan where the only things on that circuit?
snake2k is offline   Reply With Quote
Old 02-19-2009, 05:15 PM   #4
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,400
Default

? about wiring a combo bathfan/light/heater


Yes, it will be a problem. The instructions will call for a dedicated circuit. Equipment must be installed according to directions. It will also be a Code violation to share the circuit that way. You will also trip the breaker by having too much draw on the circuit.
Jim Port is offline   Reply With Quote
Old 02-19-2009, 06:23 PM   #5
Member
 
Join Date: Oct 2007
Posts: 2,294
Default

? about wiring a combo bathfan/light/heater


The heater portion is a big draw on those units.

You house was wired in the 80's where they ran a 15amp circuit for the bathroom and outside receps. The problem will arise when you try to use a hair dryer and the bath heater at the same time.

You should just run a new circuit to a new box and run 4wire cable (if you can find it) from the switch to the new unit. I lieu of a 4 wire cable, use a 3 and a 2. Use both whites as neutrals to avoid a technical code violation.
220/221 is offline   Reply With Quote
Old 02-19-2009, 06:42 PM   #6
UAW SKILLED TRADES
 
Stubbie's Avatar
 
Join Date: Jan 2007
Location: Kansas
Posts: 4,875
Default

? about wiring a combo bathfan/light/heater


Might as well get one with a night light then you can run two 12/3's...

The wiring is not that difficult, you'll get a control switch most likely with a rocker style to it.

Depending on the wattage of the heater the total connected load will range from 11 amps to 14.5 amps. That's with everything thing on the unit running.

Generally the manufacturer specifies the size of the branch circuit...in your case it wants a 15 amp branch circuit that is dedicated to that combo ventilation fan. What the others are saying to you is that the heater will draw around 1200 to 1500 watts and a hair dryer 1200 to 1500 watts. Taking the lowest wattage and both running thats 2400 watts. A 15 amp branch circuit will only handle 1800 watts. So you would have a 600 watt overload if you shared the combo unit on the bathroom 15 amp circuit operating the hair dryer and heater at the same time.
__________________
" One nice thing about the NEC articles ... you have lots of choices"

Stubbie
Stubbie is offline   Reply With Quote
Old 02-19-2009, 06:58 PM   #7
Member
 
Join Date: Oct 2007
Posts: 2,294
Default

? about wiring a combo bathfan/light/heater


Two 12/3's in that 3" square JB ...should be a piece of cake

I'd stick with 14's .

In fact, the last one I installed did have a night light and I used a 3wire and a 2 wire. I didn't realize it was a violation at the time to use the neutral from another cable.

The switch was huge too. Yeah,,,,I remember. I hate those things.
220/221 is offline   Reply With Quote
Old 02-19-2009, 08:03 PM   #8
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 7,400
Default

? about wiring a combo bathfan/light/heater


Just easier to run smurf tube instead of 2 cables into those tiny JBs built into the fans IMO.
Jim Port is offline   Reply With Quote
Old 02-19-2009, 08:39 PM   #9
UAW SKILLED TRADES
 
Stubbie's Avatar
 
Join Date: Jan 2007
Location: Kansas
Posts: 4,875
Default

? about wiring a combo bathfan/light/heater


Quote:
Originally Posted by 220/221 View Post
Two 12/3's in that 3" square JB ...should be a piece of cake

I'd stick with 14's .

In fact, the last one I installed did have a night light and I used a 3wire and a 2 wire. I didn't realize it was a violation at the time to use the neutral from another cable.

The switch was huge too. Yeah,,,,I remember. I hate those things.
The light is usually with the fan on 2 position rocker switch and the night light is with the heater on a 2 position rocker switch. Yep the switch is comparable to a gfci receptacle. Any way that equals 2...3 conductor cables there is usuall two neutrals at the fixture and yeah they want you to run each neutral on each 3 conductor to the switch. I really don't see why you have to do that. Like you said... Just use the white in a 2 conductor for a hot and connect the neutral of the 3 conductor to the neutrals of the fixture. I don't see the issue?? Most of these 4 way fixtures I've seen require a 20 amp circuit.
__________________
" One nice thing about the NEC articles ... you have lots of choices"

Stubbie
Stubbie is offline   Reply With Quote
Old 02-19-2009, 09:59 PM   #10
Newbie
 
Join Date: Jan 2009
Posts: 10
Default

? about wiring a combo bathfan/light/heater


Thanks everyone for the input.This is looking more involved than I thought.Running a new circuit is something I've never done before and sounds like something that should be left to a pro.Thanks again for the help.

snake2k is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wiring diagram for three-way switches with pilot light SaxTeacher Electrical 34 09-15-2013 07:53 AM
New Home Wiring - Seeking Expert Advice Dirtrnr Electrical 3 02-10-2009 10:33 AM
Does this wiring diagram work? beezlebub03 Electrical 7 05-04-2008 11:54 PM
Oven/Micro Combo wiring.... dcd22 Electrical 35 10-18-2007 10:45 AM
Knob & Tube wiring - How concerned should we be? hotdiggitydog Electrical 6 04-11-2006 07:52 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.